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Preferred Materials and Processes

Non-Chromated Coatings
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Non-Chromated Integral Fuel Tank Coating
Non-Chromated Integral Fuel Tank Coating on Composite, Titanium and CRES Surfaces
  • BMS 10-123
  • BAC 5357

Subject: Non-Chromated Integral Fuel Tank Coating

Boeing has a commitment to producing environmentally preferred products. The company actively works to minimize or avoid the use of potentially hazardous materials, including hexavalent chromium. Boeing has worked with suppliers to identify and qualify non-chromated coatings for use in fuel tanks.

  • BAC 5357 - Application of Non-Chromated Integral Fuel Tank Primer for Composite, Titanium and CRES Surfaces
  • BAC 5748 - Abrasive Cleaning, Deburring, and Finishing
  • BAC 5750 - Solvent Cleaning
  • BMS 5-45 - Low Density Integral Fuel Tank Sealant
  • BMS 15-5 - Wiper, Absorbent, Process Cleaning

This does not supersede drawings or specification requirements. This information shall not be used for production, test, or acceptance processes.

Boeing Material and Process Technology (M&PT) has tentatively qualified PRC-Desoto CA7501A and CA7501B and SICO Inc. Base 577-635, Cure (Hardener) 576-09, Thinner 580-026.

Requirement Application of Non-Cr Integral Fuel Tank Coating BMS 5357
  • BAC 5725 - Stripping Organic Materials
  • BAC 5408 - Vapor Degreasing
  • BAC 5748 - Abrasive Cleaning, Deburring, and Finishing
  • BAC 5750 - Solvent Cleaning
  • BAC 5763 - Emulsion Cleaning and Aqueous Degreasing
  • BSS 7234 - Viscosity, Zahn
  • BSS 7217 - Air Cleanliness, Shop Compressed Air
  • BSS 7225 - Adhesion, Tape Test
Facilities: Surface preparation, mixing, application, curing, and rework areas shall be adequately ventilated and protected from uncontrolled spray, dust, fumes, and particulate matter.
Manufacturing: Care should be taken during abrading to prevent exposing or damaging fiberglass, aramid, or carbon fibers. Damaged or exposed fibers are cause for rejection of parts.
Maintenance: The cured coating may appear glossy as pot life increases. This appearance is acceptable and should not warrant hardware rejection.

The information provided in this website is intended to assist suppliers to the Boeing Company. Although every effort has been made to ensure its accuracy, we cannot warrant its accuracy for use in environmental compliance matters. You should check with your local, state, or Federal regulatory agencies if you have questions regarding the proper procedures or other matter related to compliance.

Safety Reminder:
Refer to Manufacturer's material safety data sheets, or contact the manufacturer for safety and health information pertaining to hazardous materials.


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